Triangular cup



FIG. 1 is a perspective view of the triangular cup, showing my new design;

FIG. 2 is a top view of the triangular cup;

FIG. 3 is a front view of the triangular cup;

FIG. 4 is a back view of the triangular cup;

FIG. 5 is a bottom view of the triangular cup; and,

FIG. 6 is a right side view of the triangular cup, the left side view being a mirror image. 

I claim the ornamental design for the triangular cup, as shown and described. 